Electbic connecteb



F. C. KOLLATH ELECTRIC CONNECTER Sept. 15,1931.

Original Filed Sept. 27, 1927 v09 0 2. 3 aa n m h i I 7 I w sx s W mu m w M w ma a Sept 15, 1.931

- 1 UNITED STATES Re. 1s,193

PAT T o F cE TO DANIEL nrlacrmc eonnmmn January. 14, 1980, Serial Original Io. 1,748,821, dated This invention relates to electric connecvters', and more especially to that class of heavy duty connecters, or so-called attachment plugs used .on extension cords in connection with portable machine tools. The electrical connection is usually made to the power line by inserting the plugina wall receptacle provided for the purpose, and is accomplished. by a straight in push .of the plug and disconnected by a straight out pull.

One of the objects of the invention is to provide a 'connecter for a plurality of con-f ductors and in which one or all of the connecters may be fused, and in which the fuses 15 are supported in the connecter and are readily accessible for insertion and removal without disassembling the connecter. 3

Another object is to provide an electric connecter which hasa flexible rubber casing 20 clampingly engaging a base member, the base member having a fuse mounted thereon for electrically connecting a conductor to a contactprong/ 1 A further object is to provide a new and zif novel electric connecter for electrically connecting apower device or tool with the electric circuit so that a shortcircuit or an overload will blow out a fuse arranged in the connecter casing and prevent fuses on the 130 maincircuit from beingblown, thus render.

ing only' the device inoperative without affecting other tools, devices, or lights common to the circuit.

A still-further object is to provide an imfew, simple parts, which may be quickly and easily assembled and taken apart, and which.

proved electric connecter which is made of- No. 222,229, filed September 27, m7, Application for reissue filed March 8, 1931. Serial 110.5203.

the'c'asing. A fuse may be electrically arranged between the end of one or more of the conductors and the prongs whereby an overl load on a device or tool to which the connecter is connected will'be rendered inoperable without affecting other tools, devices or lamps on the same power circuit. The rubber casing is flexible and ,may be stretched ing the base member and its cooperating parts and connections in proper operable relationship and position. An-outer shell may be provided for protecting the contact pron from becoming damaged or sprung shou d the connecter be. dropped or otherwise roughly handled. When, this latter shell-is employed, a cooperating electri cal connection or receptacle is provided with a complemen- 1 tary socket or groove to receive the forwardly extendin shell. A clamping ring may be arranged about the outside of the casing to assist in supporting the various parts and elements in proper position in the casin The accompanying drawings illustra a selected embod'ment of the invention and the views therein are as follows;

Fig. 1 is a perspective vlew of the improved connecter or plugin combination with its cooperating receptacle.

Fig. 2 'is an end view of the connectenor plug.

Fig. 3 is a detail longitudinal sectional view on the line 3-3 of Fig. 2.;

. Fig; is a transverse sectional view on the line 4-4 of Fig. 3, and is shown rotated anticlockwise thirty degrees from the position shown in Fig. 3.

Fig. 5 shows a modified form of combined housing and Easing.

Referring to the drawings, 1 designates a plug or 'connecter which is adapted to coop erate with the receptacle 2 which is provided with sockets 3 toreceive the connecter pins or contact prongs 4. The pins or prongs 4 make suitable electrical connection with the power line and they may be split as shown at 5 to provide frictional contact. x

The receptacle 2 may beprovided with an annular groove 6 to receive a cylindrical housing or shell 7 in which the pins are supported- This shell or housing may be a part of" the base or a separate member, as shown, and protects the pins from damage when the connecter is not in the receptacle and assists in supportingthe connecter in the receptacle. A lug 8 on the housing or shell cooperates with a notch 9 in the receptacle to maintain the alignment of 'the pins with'their respec-v tive sockets.

In the present instancea three pole plug has been shown, but it is evident that any number desired may be used.

The plug or connecter proper comprises two insulating bases 10 and 11, which are secured together by means of the screws 12 and 13 and the members 14 intowhich the'screw's are threaded. (The housing or shell 7 may be also supported on the members'14 by screws The base 11 is providedwith radial slots,

or depressions 16 in which fuse clips 17 and 18, for supporting the fuses 19, are arranged. The clips may be secured to angle members 20 and 21, as shown. The angle members 20 are secured rigidly to the base 10 by means of the pins 4 which are threaded into them, the pins being provided with a shoulder. 22

- from being transmitted to connections.

for engagement with the. base 10. The angle members 21 may be secured in a similai manner to the'ba'se 11" by means of members 23 which are internally threaded to receive binding screws 24. The binding screws may be arranged in depressions 25 in. the rear of the base 11 and are adapted to receive the conductors26. i

A strain relief member is provided for preventing a pulling strain on the conductors This strain relief comprises members or parts 27 and 28 which may be fastened to the 'base member 11 by means of the screws 13.

Screws 29 may be provided for connecting the two parts together for clampingly engaging'the cable 30.

A casing 31 which is preferably made of flexible resilient rubber material provides a closure for the base member; and its cooperating elements, parts, and connections. This ,casing stretches within reasonable limits to permit insertion or withdrawal-of the base member. v The casing clampinglyengages the base member and tends to hold the parts in assembled relationship and due to its flexibility, permits it to be stretched to remove the base. To further maintain the parts within the casing, a clamping ring 32, .secured in position b teriorly o the casing as clearly shown in the drawing. The casing is relatively long provide ahandle for the connecter.

screws 33, may be arranged ex- I The casing 31 may also be provided with an internal ring or collar 34 which engages a complementary groove 35 in the housing or shell 7. i 7

It will be noted that when the casing 31'is removed thenfuses are readily accessible and ma be easily inserted and removed.

ile the device, as illustrated in the drawings', shows a two part insulating base, it will be understood that it may bemade in a single three contact prongs, as shown, a greater or less number may be used. r

In Fig. 5 a modified structure isshown with the shell or housing 7 formed integral with the casing.- A strain relief or cord grip, 7

piece if desired, and that instead of having comprising the parts 36 and 37, is formed as a art of the casing 38 which inthe-modified orm is made of metal or other suitable insulating material. However, the use of the flexible, resilient rubber casing and handle ,31 is preferred over the construction shown in Fig. 5, the modification being solely for the purpose of showing another way in which a protecting shell or housingfor the prongs may be constructed. 1

Changes maybe made in the form, construction, and arrangement of the parts without departing from the spirit of the invention or sacrificing any of its advantages, and the right is hereby reserved to make all changes as fairly fall within the scope of the following claims. v

he invention is hereby claimed as follows: j i 1. An insulating basehaving electrical conductors therethrough, one end of said conduc tors terminating in electrical cqnnecters, re movable fuses in said base and forming a part of said conductors, a forwardly extending shield around said connecters and mounted on said. base, a flexible and resilient rubberlike casing around said base and extending over said shield, and means for removably securing said casing to said shield.

, 2. An electrical connecter comprising an.

upper insulating base, and a lowerinsulating base, a plurality ofiradially spaced conductors extending through said bases-and terminating in connectors," means radially spaced between said conductors for securing said bases together, a cord grip supported on said securing means, a forwardly extending connectershield alsosup rted" on 'said' securing means, and a flexi le rubberlike casing around said bases and removably secured to said shield. s Y

3. An electrical connecter comprising an upper insulating base, and a lower insulating'base, a plurality of radially spaced conductors extending through said bases and ter- 1 minating at one end in connecters, fuses in said conductors and removable fromthe side of one. of said bases, means radially spaced between said conductors for securing said securin means, and a fle'xible and resilient movably secured to said. shield;

rubberhke casing around said bases and re- .4. An electrical connecter comprising an upper insulating base, and a lower insulating base, a lurality of radiallyspaced conductors extending through said bases and terminatmember to be clampingly supportedin the casing, contact prongs extending from saidbase member and beyond the end of the rubber casing, electrical conductors extending into said casing and operatively and electrically connected-to said prongs, and a fuse operatively and electrically arranged between at least one of said prongs and an end of a coning-v at one end in electrical connecters and at .ductor.

the other, end in binding terminals, radially spaced securing members between said bases, means securing said upper base to said securing member, means securing said lower base to said securing member, a cord grip supported on said last named means, a connecter shield around said connecters and secnred to said securing members, and a casing around said bases.

5. In combination, an electric connecter having outwardly extending contact prongs, a shell arranged about said prongs, and a receptacle for said connector, said receptacle havin a complementary recess for receiving said s ell. I i

6. An electric connecter comprising a base member, a flexible rubber casing receiving said base member and clampingly engaging a said base member, contact prongs operatively supported by said base and, extending a predetermined distance beyond the end of said casing, conductors operatively connected to said prongs, a fuse operatively arranged between 8. prong and a conductor, and a strain relief member connected to said base member and clampingly engaging "the conductors.

7. An electric connecter comprising a base member, a flexible rubber casing receiving said base member and clampingly engaging said base member, contact prongs operatively supported by said base and extending a predetermined distance beyond the end of said casing, conductors operatively connected to said prongs, a fuse operatively arranged between a' ron and a conductor, and a housing exten ing yond the end of said casingand providing protection for said contact prongs.

- 8. An electric connecter comprisinga base member, a flexible rubber casing receiving said base member and clampingly engaging s said base member, contact prongs operatlvei v ly supported by said base and extending a predetermined distance beyond the end of. said casing, conductors operatively connected to said prongs, a'fuse operatively arranged between a prong anda eonductor,-a strain relief member connected to said base member and clampingly engaging the conductors, and a housing extending beyond the end of said 7 casing and providing protection for said contact prongs. v I

9. An electric connecter comprising a base member, a flexible rubber easing surrounding said base member and causing the base connected to said prongs, a fuse operatively and electrically arranged between at least one of said prongs and an end of a conductor, and a strain relief memberarranged inside of said casing and connected to the base member and clampingly engaging the conductors for preventingany straln on said conductors to be transmitted to electrical connections in side of the casing.

11. An electric connecter comprising a base member, a flexible rubber casing surrounding said base member and causing the base member/to be clampingly supported in the casing, contact prongs extending from said base member and beyondthe end of the rubber casing, electrical conductors extending into said casing and operatively and electrically connected to said prongs, a fuse operatively and electrically arranged, between at least one of said prongs and an end of a conductor, and 'a housing extending beyond the casing and protecting the con due-tors. v

12'. An electric connecter comprising a base member, a flexible rubber casing surrounding said base member and causing the base member-to be clampingly supported in the casing, contact prongs extending from said base member and beyond the end of the rubber casing, electrical conductors extending into said casing and operatively and electrically connected to said prongs, a fuse operatively and electricallyarranged between at least one of said prongs andan end of a conductor, a strain relief member arranged inside of said casing and connected to the base member and clampingly engaging the conductors for preventing any strainon s'aid conductors to be transmitted toelectrical connections. inside of the casing, and a housing extending beyond the casing and pro tecting the conductors; p

. FRANCIS C. KOLLATH.

" ICERTIFICAETE opqcokmacnqn.

Reissue PM No. 13,193. Granted semmr I5, 1931. w

.FRAHCIS c. Komrn.

It, is-hereby certified that the residence of the assignee of theone-half in terest in the-above numbered patent was erroneously written and printed as "Detroit, Michigan", whereas said residence should have been written and, printed: as

Evanston, Illinois, as shown by the records of assignments in this office; and

same may conform to the record of the case in the Patent Office: Signed snd sealed this 3rd day'of; November, A; D. 1931.

that the said Letters Patent should he read with this correction therein that the",

I J I ,IMJJQ more,

;('Se s l) v Acting Comissionerof Patents. 

